These icy bodies orbit the sun just like the major planets, yet they follow their own rules, often traveling along elongated ...

NASA's Dawn mission to the main asteroid belt, granted a second extended mission earlier this year, will end later next year after a final set of close-up observations of the dwarf planet Ceres. Pluto ...

Using new observations from the James Webb Space Telescope (JWST), astronomers have discovered methane emission on a brown dwarf, an unexpected finding for such a cold and isolated world. Published in ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts to spot it. Some astronomers ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 OF201, ...